Title: CVE-2018-1308: XXE attack through Apache Solr‘s DIH’s dataConfig request parameter category: solr/security cve: CVE-2018-1308
CVE-2018-1308: XXE attack through Apache Solr‘s DIH’s dataConfig request parameter
Severity: Major
Vendor:
The Apache Software Foundation
Versions Affected:
Description:
The details of this vulnerability were reported to the Apache Security mailing list.
This vulnerability relates to an XML external entity expansion (XXE) in the &dataConfig=<inlinexml> parameter of Solr's DataImportHandler. It can be used as XXE using file/ftp/http protocols in order to read arbitrary local files from the Solr server or the internal network. See [1] for more details.
Mitigation:
Users are advised to upgrade to either Solr 6.6.3 or Solr 7.3.0 releases both of which address the vulnerability. Once upgrade is complete, no other steps are required. Those releases disable external entities in anonymous XML files passed through this request parameter.
If users are unable to upgrade to Solr 6.6.3 or Solr 7.3.0 then they are advised to disable data import handler in their solrconfig.xml file and restart their Solr instances. Alternatively, if Solr instances are only used locally without access to public internet, the vulnerability cannot be used directly, so it may not be required to update, and instead reverse proxies or Solr client applications should be guarded to not allow end users to inject dataConfig request parameters. Please refer to [2] on how to correctly secure Solr servers.
Credit:
麦 香浓郁
References:
[1] https://issues.apache.org/jira/browse/SOLR-11971
[2] https://wiki.apache.org/solr/SolrSecurity